Sioux Falls Mayor Paul TenHaken said an emergency operations center has been set up to assess the damage throughout the city.

TenHaken said a shelter has been opened out at the fairgrounds for anyone impacted by the storm.

TenHaken said they are working on filing an emergency declaration for the city of Sioux Falls but they haven’t heard of any casualties or serious injuries from the storm.

Todd Heitkamp with the Sioux Falls National Weather Service said they haven’t confirmed yet if a tornado caused the damage. He said that assessment will happen this morning once it’s light out.

Heitkamp says there is no way just one tornado caused significant damage. He doesn’t know if the storm was from multiple tornados or straight-line winds.

Several traffic signals are out this morning as well. So if you are traveling throughout Sioux Falls, be aware of that. Officials said to treat the intersection as a four-way stop.

TenHaken said there was a breach of protocol and not all the tornado sirens were sounded.

TenHaken said they will be looking into the breach in the next few hours and days.

TenHaken said its too early to say what the breach was.

Heitkamp reminds people those sirens are outdoor sirens not tornado sirens. They aren’t meant to warn people indoors. He said that’s why it’s important to have another source like a weather radio to get alerts.

The city will hold another briefing at 10:30 this morning and KTIV will continue to update this story.

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Around 11:45 p.m. on Tuesday, the National Weather Service tweeted a tornado was confirmed on the south side of Sioux Falls, South Dakota with damage being reported.

Brett Wulff, store manager at Advanced Auto Parts on W. 41st, says they're experiencing a gas leak. Can definitely smell it. Store closed at 9 p.m., so luckily no one was inside at the time. @KDLTNews@KDLTWeatherpic.twitter.com/lPf0d1Sxxs

The Sioux Falls Police issued a “No Travel Advisory” in Sioux Falls because of all the downed power lines and trees. They are asking people to stay off the roads until routes are safe to travel and clear of debris.

A No Travel Advisory has been issued in Sioux Falls because of all the downed power lines and trees. Please stay off the roads until routes are safe to travel and clear of debris. /713